Hard to reduce leaf wetness if it is raining all the time. Easy if the lawn gets all its water from irrigation. Nitrogen, iron, manganese. Think about your nitrogen source. I prefer Eagle 20 EW alternated with Cleary 3336 on bermuda. Consider tank mixing fungicides with Protect DF. Fungicides are best applied at 1-2 gallons per 1000 with spray equipment intended to provide good leaf coverage.

Followed up with the customer and he was watering ever other day. Had the problem area running at 25-30 min per zone on rotating heads. On top of the fact that we've gotten 1" of rain in the last week plus 2-3" today from the tropical storm.

Advised him to shut off irrigation and scheduled next app would be in 1-2 weeks.

One reason why if we could control everything we would be much more successfull.

Is the dollar spots on sloped areas or areas near downspouts? Sometimes in areas where there is excess water, the water can wash out a lot of the nutrients. Your fert program may be good but those particular spots just get way too much water washing across them.